🚀 go-pugleaf

Steven <steven.vandenbosch@alcatel.be> wrote in
message news:36F60953.F74025B4@alcatel.be...

> Ok, I've got the book here : It's "PC onderhoud en uitbreiding"
> from "EC".  It's a translation from a german book from "Data
> Becker", but doesn't state the original title.

You mangled what it did say, utterly.

> In chapter 9 - The hard disk : speed ain't no
> magic word - on paige 472 and 473 it states :

Looks like double dutch to me.

> Klemmende koppen

> Met name bij oudere schijven, die al lang gebruikt worden, treedt
> een probleem op.  Door de centrifugaalkracht wordt de laag op de
> plaat langzaam naar buiten geslingerd.  De plaat wordt daardoor
> aan de rand dikker dan bij het midden.  Helaas wordt de kop hier
> meestal geplaatstbij het parkeren en kan deze vast komen te zitten!
> U kunt dit herkennen, doordat de schijfmotor bromt en de plaat probeert
> op toeren te komen - zonder succes.  Als eerste en eenmalige oplossing
> moet u in dit geval de harde schijf demonteren en er zijwaarts een tik op
> geven, om de kop los te maken.  Als bij inschakelen de harde schijf wel
> op toeren komt, maakt u onmiddellijk een back-up van alle belangrijke
> bestanden en koopt u direct een nieuwe harde schijf!

> In english this would be:
> Jamming heads
> Especially with older disks, that are already used over a longer
> period of time, a problem occurs.  Because of the centrifugal
> force the layer  on the disk is slowly forced outward.  In that
> way the disk becomes thicker by the edges than in the middle.

They are talking about the platter lubricant, NOT the
'magnetic particles' you mangled what the book said into.

> Unfortunately is this theplace where the head
> is placed during parking and can get stuck!

Yes, but its degraded platter lubricant that
causes that, not the 'magnetic particles'

> You can identify this problem, because the diskmotor
> is humming and the disk is trying to spin up - to no avail.

That is correct, but not what the original poster
was seeing. Otherwise known as stiction.

> As a first and final solution you have to disassemble
> the harddisk en give it a tick on it's side, to free the head.

In english you would say remove the harddisk, not disassemble it.
Disassemble it implys you pull the harddrive to bits, not a good idea.

> If the disk spins up when powered on, you instantly make a backup
> of all important files and you immediatly buy a new hard disk!

'you immediately make a backup' etc.

> Never the less, I've calculated the speed of the outer tracks of a
> 10000! rpm disk and it was so low that I really don't think anymore
> that this is really possible (also the layer being only microns thick).

Yes. The main effect is deterioration of the platter lubricant which can
see the head stick to the platter when it stops, not a centrifical effect.

> Even more, I've opened up an XT-harddisk of 40MB
> (bigfoot) and the heads are parked on the inner tracks.
> I will open up another disk and see where this one parks.
> If this one also parks on the inside I will send a mail to
> the publisher (EC) to ask where they got their information.

Dreamt it up most likely.